Question

convert 12.044 ×10^22 molecules of h2o into moles​

Answer 1

I assume you are required to find number of moles of 12.044 x 10^23 molecules of water.For this we will use well-known formula :

N(number of molecules)=n(number of moles) x NA(constant), the result is therefore equal to

n=N/NA = 12.044* 10^23 molecules/ 6.02 * 10^23 molecules/mol = 2mol

I hope this made it clear for you

Answer 2

Given:

Molecules of H₂O = 12.044 × 10²² molecules

To find:

Moles of H₂O.

Solution:

According to mole concept,

1 mole = 6.022 × 10²³ molecules

Therefore according to question, we have

for H₂O molecule,

6.022 × 10²³ molecules of H₂O contains number of moles = 1 mole

        1      molecule of H₂O contains number of moles = $\frac{1}{6.022 \times 10^2^3}$ mole

12.044 × 10²² molecules of H₂O contains number of moles        

                                                                   =  $\frac{1}{6.022 \times 10^2^3} \times 12.044 \times 10^2^2$moles

                                                                    = 2 × 10²²⁻²³ moles

                                                                    = 2 × 10⁻¹ moles

                                                                    = 0.2 moles

So, 12.044 × 10²² molecules of H₂O contains 0.2 moles.